Using Microcalc:

1. Choose Beginning Calculus from the initial menu and press .
2. Use the arrow keys to move to the menu item Area, press and .
3. At the prompt F(x) =, enter the formula sin(x)
4. and, at the prompt G(x) =, enter the formula cos(x)
5. Enter the bounds at the prompts

   x_0 = 0 x_1 = ã

   You can enter pi by pressing at the same time.
6. Enter the bounds at the prompts

   y_0 = 0 y_1 = 1

7. You will see the following graphs and the areas between them.

   

8. If you press then you will see:

        Algebraic area = 2.00000 000
        Geometric area = 2.82842 713